Door latch device for automobile

Abstract

In order to reliably maintain a door in a closed state even if the direction of inertia acting on an inertia lever is inverted when impact is applied, this door latch device for an automobile is configured so that, when the inertia lever 15 is moved while an open link 17 is located at an unlocking position, against the pressing force of a spring 26 from a standby position to a blocking position by inertia force exceeding a set value, the inertia lever 15 makes contact with the open link 17 to move the open link 17 from the unlocking position to a locking position, thereby preventing the open link 17 from moving from the locking position to the unlocking position, and engages with the open link 17 to prevent the open link 17 from moving from the blocking position to the standby position.

Description

technical field [0001] The present invention relates to an automobile door lock device, and particularly relates to an automobile door lock device capable of maintaining a closed state of a door even when a side impact is received. Background technique [0002] Conventionally, for example, Patent Documents 1 and 2 describe an invention capable of maintaining the closed state of the door when the door receives an impact from the side. [0003] According to the invention described in Patent Document 1, the inertial operating lever is pivotally supported on the opening link that rotates in conjunction with the operation of the outside handle provided on the outside of the door, and an impact exceeding the set value acts due to an impact from the side. The inertial lever prevents accidental opening of the door by swinging from a first position avoiding abutment against the housing to a second position abutting the housing and constraining the opening link in the event of an iner...

AI Technical Summary

Problems solved by technology

[0008] As described above, if the direction of inertia acting on various movable parts is reversed from the outward direction to the inward direction, the invention described in Patent Document 1 has the following problem: when an impact is applied from the side, although the inertial operating lever moves from the first position Moves to the second position, but immediately returns to the first position without reliably constraining the open linkage

[0009] In addition, in the invention described in Patent Document 2, since the force applied to the inertial operating lever from the locked position toward the unlocked position is restricted by engaging the spring member with the restricting portion, when the direction of inertia acting on the inertial operating lever is reversed, There is also a risk of the spring member coming out of the restraint, moving the inertia lever towards the unlocked position

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